Question

Neet 1990] a car covers the first-half of the distance between two places at 40 km/h and other half at 60 km/h. The average speed of the car is

Answer 1

Answer:

48 km/hr.

Explanation:

When a body covers two equal distances with two different speeds,

Its average speed is given by 2s1s2/(s1 + s2)

Where s1 & s2 are the two different speeds with which the body covers equal Distances.

Here,

s1 = 40 km/hr.

s2 = 60 km/hr.

so, the average speed will be

=> 2 (40)(60)/(40+60) km/hr.

=> 4800/100 km/hr.

=> 48 km/hr.

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